Answer:
What is it that after you take away the whole, some still remains?
What is it that you must give before you can keep it
It is a gruesome form of betray.
Environmentalists want to keep this from drying.
Handy when you need to measure something or run a kingdom.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?